Journals / Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2018 / Cilt: 4 - Sayı: 2

Poly (4-Vinyl Pyridine)-Co Ionic Liquid Cryogel Composite Catalyst for Simultaneous Reduction and Degradation Reactions of 4-Nitrophenol and Dye Mixtures

4-Nitrofenol ile Boyar Madde Çözelti Karışımlarını Aynı Anda İndirgeme ve Bozundurma Reaksiyonları için Poli(4-Vinil Piridin)-Co İyonik Sıvı Kriyojel Kompozit Katalizörü

Pages
15–32
DOI
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It was also calculated the % conversion and the numbers of moles of molecules catalyzed by one mole of catalyst (TOF) for the catalytic reduction and/or degradation of each one of the components 4-NP, EY and MM catalyzed by of p(4-VP)+Cl- -Co cryogel composite catalyst.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, superporous poly(4-vinyl pyridine) (p(4-VP)) cryogels were synthesized via free radical polymerization technique at cryogenic conditions and were protonated (p)4-VP)+ ) by the treated of hydrochloric acid solution.
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Key Findings & Data:Metal salt of CoCl2 from ethanol solution was loaded into p(4-VP)+Clcryogels and reduced in the presence of NaBH4 to obtain Co metal nanoparticles within ionic liquid (IL) cryogels and the amount of Co nanoparticle within cryogels was determined by using Atomic Absorption Spectrometer (AAS) and found as 121.6±7.3 mg/g within p(4-VP)+Cl- -Co cryogel composites.
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Conclusion & Impact:It was also calculated the % conversion and the numbers of moles of molecules catalyzed by one mole of catalyst (TOF) for the catalytic reduction and/or degradation of each one of the components 4-NP, EY and MM catalyzed by of p(4-VP)+Cl- -Co cryogel composite catalyst.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, superporous poly(4-vinyl pyridine) (p(4-VP)) cryogels were synthesized via free radical polymerization technique at cryogenic conditions and were protonated (p)4-VP)+ ) by the treated of hydrochloric acid solution. The prepared cryogels were characterized by using Fourier Transform Infrared Radiation (FT-IR) spectrometer, Thermogravimetric Analysis (TGA), Scanning Electron Microscope (SEM), and optic microscope. Metal salt of CoCl2 from ethanol solution was loaded into p(4-VP)+Clcryogels and reduced in the presence of NaBH4 to obtain Co metal nanoparticles within ionic liquid (IL) cryogels and the amount of Co nanoparticle within cryogels was determined by using Atomic Absorption Spectrometer (AAS) and found as 121.6±7.3 mg/g within p(4-VP)+Cl- -Co cryogel composites. Furthermore, the prepared p(4-VP)+Cl- -Co cryogel composites were used as a catalyst in reduction and degradation reaction of the mixtures of 4-nitro phenol (4-NP), eosin Y (EY), and methylene blue (MB) solutions simultaneously. Accordingly, for the each components of 4-NP/EY, 4- NP/MB and 4-NP/EY/MB mixtures over 85% conversion obtained in the presence of p(4- VP)+Cl- -Co cryogel composite catalyst. It was also calculated the % conversion and the numbers of moles of molecules catalyzed by one mole of catalyst (TOF) for the catalytic reduction and/or degradation of each one of the components 4-NP, EY and MM catalyzed by of p(4-VP)+Cl- -Co cryogel composite catalyst.

Özet

Bu çalışmada, poli(4-vinil piridin) (p(4-VP)) süper gözenekli kriyojelleri serbest radikal polimerizasyon tekniği ile kriyojenik koşullarda sentezlenmiştir ve hidroklorik asit ile muamele edilerek protonlanmıştır (p(4-VP)+Cl- ). Hazırlanan kriyojeller, Fourier Dönüşümlü Kızılötesi Işımalı spektroskopisi (FT-IR), Termogravimetrik Analiz cihazı (TGA), Taramalı Elektron Mikroskobu (SEM) ve optik mikroskop ile karakterize edilmişlerdir. P(4-VP)+Clkriyojellerine CoCl2'nin etanol çözeltisinden metal tuzu yüklenerek NaBH4 varlığında indirgenerek iyonik sıvı (IL) kriyojeller içinde Co metal nanopartikül sentezi yapılmıştır. Kriyojeller içindeki metal miktarları atomik absorpsiyon spektroskopisi (AAS) ile belirlenmiştir ve p(4-VP)+Cl- -Co kriyojel kompozitinin 121,6±7,3 mg/g Co nanopartikülü içerdiği belirlenmiştir. Hazırlanan p(4-VP)+Cl- -Co kompozit kriyojelleri 4-nitro fenol (4-NP), eosin Y (EY), ve metilen mavisi (MM) çözeltilerinin karışımlarını aynı anda indirgeme ve bozunma reaksiyonlarında katalizör olarak kullanılmıştır. Buna göre, 4-NP/EY, 4-NP/MB ve 4-NP/EY/MB karışımlarındaki herbir molekül için p(4-VP)+Cl- -Co kriyojel kompozit katalizör varlığında %85’in üzerinde dönüşüm elde edilmiştir. Ayrıca, 4-NP, EY ve MM bileşiklerinin çözeltilerinin karışımlarında p(4-VP)+Cl- -Co kriyojel kompozit katalizörü kullanılarak indirgenme ve/ya bozunma reaksiyonları gerçekleştirilerek dönüşüm% ve bir mol katalizörün dakikada katalizlediği molekülün mol sayısı (TOF) değerleri hesaplanmıştır.

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Cite This Article

ŞAHİN, A. D., YILDIZ, S., ŞAHİNER, N. (2018). Poly (4-Vinyl Pyridine)-Co Ionic Liquid Cryogel Composite Catalyst for Simultaneous Reduction and Degradation Reactions of 4-Nitrophenol and Dye Mixtures. Çanakkale Onsekiz Mart Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 4 - Sayı: 2, 15–32. https://ajindex.com/articles/154354

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